Effect of the thermal stability of chlorine‐containing polymers on their compatibility with poly(methyl methacrylate)

Abstract

Phase diagrams for PVC‐PMMA and CPE‐PMMA systems were determined by electron probe microanalysis in combination with scanning electron microscopy. Further the dehydrochlorination kinetics of chlorine‐containing samples was investigated by investigating the change of X‐ray radiation intensity of chlorine after isobar‐isothermal annealing of the polymer mixtures. The solubility of the mixtures was found to be affected by the degree of dehydrochlorination of the samples. The shape of the curve passes an extremum which is immediately connected with the dependence of the phase diagrams on dehydrochlorination kinetics. The effect of the conditions of mixture preparation on the compatibility of the components and the kinetics of the change of compatibility during annealing were determined. The thermally induced phase separation in the mixtures is shown to be caused by kinetic processes described.

Phase equilibria and phase structures of polymer blends

“…This problem was discussed in detail in the study. 103 A change in the phase state of the system under changes in the chemical nature of the components is of its own interest. At present, theoretical aspects of this problem are in their developmental stage and the required experimental data are being accumulated.…”